Is this what your screen looks like?
Recipient E-Mail Address - The email address you want snapshots mailed to. This does not have to be the same account as the rest of the information below.
SMTP Mail Server - smtp.gmail.com
Port - 465
User Name - the username for your gmail account. only the username, not the @gmail.com
Password - The password for this gmail account (case-sensitive).
Sender E-Mail Address - The email address that the recipient will see it coming from. 99% of the time it is the email address that the "user name" is with the @gmail.com.
Send next E-mail after - 30 seconds is default.
Use SSL-TLS - Select SSL-TLS from the drop-down.
CLICK SAVE SETTINGS.
Click Test.